The Metis had established a provisional government to communicate or negotiate with the Canadian government in December, 1869. They elected Louis Riel as President. The Government Included French peaking Metis and English Speaking Protestants.
Almost Immediately after the provisional government was established, A group that called themselves the Canadian party attempted to over throw it. They were concerned with the rights and welfare of the English Protestant settlers
We should over throw the Government!
The provisional government captured about 50 Canadian party members and imprisoned them in Fort Gary. Thomas Scott, prominent member of the Orangemen, was on of the men captured. He insulted many Metis guards and was a tough a prisoner
Thomas Scott was tried in court for his disobedience against the provisional government, found guilty, and executed.
After the conflict, the provisional government wanted to make Manitoba a province since provinces were self-governed. The Canadian government passed the Manitoba Act to please the Metis and French Canadians
Even though the Manitoba Act had passed, many people in Ontario were upset with the execution of Thomas Scott. MacDonald sent armed forces to secure the Red River to "provide protection" from the Americans. Once they arrived, Fort Gary was deserted. Riel had gotten word of the attack and fled, knowing they would have killed him.